linux-kernel - Re: [PATCH 1/3] dt-bindings: clock: Add Qualcomm SC8180X Camera clock controller

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Message-ID: <b96f8432-132b-4c16-951e-718e91ec52a5@quicinc.com>
Date: Thu, 24 Apr 2025 16:08:50 +0530
From: Satya Priya Kakitapalli <quic_skakitap@...cinc.com>
To: Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
        Bjorn Andersson
	<andersson@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        "Stephen
 Boyd" <sboyd@...nel.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski
	<krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Konrad Dybcio
	<konradybcio@...nel.org>
CC: Ajit Pandey <quic_ajipan@...cinc.com>,
        Imran Shaik
	<quic_imrashai@...cinc.com>,
        Taniya Das <quic_tdas@...cinc.com>,
        "Jagadeesh
 Kona" <quic_jkona@...cinc.com>,
        <linux-arm-msm@...r.kernel.org>, <linux-clk@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/3] dt-bindings: clock: Add Qualcomm SC8180X Camera clock
 controller


On 4/22/2025 5:11 PM, Bryan O'Donoghue wrote:
> On 22/04/2025 06:42, Satya Priya Kakitapalli wrote:
>> Add device tree bindings for the camera clock controller on
>> Qualcomm SC8180X platform.
>>
>> Signed-off-by: Satya Priya Kakitapalli <quic_skakitap@...cinc.com>
>> ---
>>   .../bindings/clock/qcom,sc8180x-camcc.yaml         |  65 ++++++++
>>   include/dt-bindings/clock/qcom,sc8180x-camcc.h     | 181 
>> +++++++++++++++++++++
>>   2 files changed, 246 insertions(+)
>>
>> diff --git 
>> a/Documentation/devicetree/bindings/clock/qcom,sc8180x-camcc.yaml 
>> b/Documentation/devicetree/bindings/clock/qcom,sc8180x-camcc.yaml
>> new file mode 100644
>> index 
>> 0000000000000000000000000000000000000000..b17f40ee53a3002b2942869d60773dbecd764134
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/clock/qcom,sc8180x-camcc.yaml
>> @@ -0,0 +1,65 @@
>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/clock/qcom,sc8180x-camcc.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Qualcomm Camera Clock & Reset Controller on SC8180X
>> +
>> +maintainers:
>> +  - Satya Priya Kakitapalli <quic_skakitap@...cinc.com>
>> +
>> +description: |
>
> You can drop the "|"
>

okay.


>> +  Qualcomm camera clock control module provides the clocks, resets and
>> +  power domains on SC8180X.
>> +
>> +  See also: include/dt-bindings/clock/qcom,sc8180x-camcc.h
>> +
>> +properties:
>> +  compatible:
>> +    const: qcom,sc8180x-camcc
>> +
>> +  clocks:
>> +    items:
>> +      - description: Board XO source
>> +      - description: Sleep clock source
>
> Missing clock-names
>

Since we are using DT based indexing method, clock names are not required.


> A suspicious lack of clock depends here. No AHB clock ?> +
>> +  power-domains:
>> +    maxItems: 1
>> +    description:
>> +      A phandle and PM domain specifier for the MMCX power domain.
>> +
>> +  required-opps:
>> +    maxItems: 1
>> +    description:
>> +      A phandle to an OPP node describing required MMCX performance 
>> point.
>> +
>> +allOf:
>> +  - $ref: qcom,gcc.yaml#
>
> A suspicious lack of clock depends here. No AHB clock ? No dependency 
> on gcc ?
>
> You call out the gcc above.
>
> Could you please recheck your list of clock dependencies.

The dependent GCC clocks are marked always on from gcc probe, hence did 
not mention the dependency here.


>
> ---
> bod